Remote Ischemic Preconditioning for Renal and Cardiac Protection in Congestive Heart Failure (RICH) Trial

This trial is testing a technique called remote ischemic preconditioning (RIPC) — brief, controlled squeezing of the arm with a blood pressure cuff — to see if it protects the kidneys and heart in heart failure patients undergoing coronary angiography (a procedure that uses dye to look at heart arteries) or a stenting procedure. **You may be eligible if...** - You are 18 or older - You have heart failure with reduced pumping function (ejection fraction below 50%) - You are scheduled for a coronary angiogram or stenting procedure - Your risk of kidney injury from the procedure is above 1% **You may NOT be eligible if...** - You are unable to give consent - You have very high or very low blood pressure at enrollment - You have peripheral artery disease in your arms, or only one usable arm - You are on dialysis or have had a kidney transplant - You are pregnant Talk to your doctor to see if this trial is right for you.